Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a first image in a sequence for a first embodiment of a display screen or portion thereof with an animated graphical user interface;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a third image thereof;

FIG. 4 is a front view of a fourth image thereof;

FIG. 5 is a front view of a fifth image thereof;

FIG. 6 is a front view of a sixth image thereof;

FIG. 7 is a front view of a seventh image thereof;

FIG. 8 is a front view of a first image in a sequence for a second embodiment of the article;

FIG. 9 is a front view of a second image thereof;

FIG. 10 is a front view of a third image thereof;

FIG. 11 is a front view of a fourth image thereof;

FIG. 12 is a front view of a fifth image thereof;

FIG. 13 is a front view of a sixth image thereof; and,

FIG. 14 is a front view of a seventh image thereof.

The appearance of the animated user interface sequentially transitions between the images shown in FIGS. 1-7 and in FIGS. 8-14. The process or period in which an image transitions into another image forms no part of the claimed design. The broken line showing of the display screen or portion thereof and graphical elements within the display screen illustrates unclaimed environment and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with an animated graphical user interface, as shown and described. 